Tubing head



June 8, 1937. L, -FO 4 2,083,089

TUBING HEAD Filed May 6, 1955 2 Sheets-Sheet J.

Ill/ll gwucnto o Laurence L. Rec-tor BMW;

L. L. RECTOR June 8, 1937;

TUBING HEAD Filed May a, 1955 2 Sheets-Sheet 2 gwuc-nkyn Ldvrence L ,Qecfor P i h g8 1937f i 'l 2,083,089 I w momentum Wor h. g Atp'iittt tn May ejiiiss, strain. m1: ".14 fclainiaxfiql. 1sa- -i4).f

This invention relates to new and useful improvementsin tubing heads.

One object 01, theinvention is to provide a\ tubing'head having improved means {or support- 1 w 5 ing the well tubing, saidmeans being so arranged; as to prevent leakage of the well pressure thereby.

An important object of the invention is toprovide an improved tubing head having a ground 'seat at its upper end for receiving a gripping ,10 ,member which supports 'the well tubing, and a packing ring at the upper end of the joint be tween said member and seat, whereby the. ground joint together with the ring will positively prevent leakage of the well pressure b'ythe slip when the sameisji r position.

Another bject f the plurality of gripping slips for Supporting a tubing 1 and arranged to be mounted within a tubin head, said slips having their meetingedges faced:

' -withpacking material, whereby' when said slips '0: the well tilbing' placed thereon, said packing material will bev compressed t 'rform leak proof *joints between said slips.

5 A- further-obiect'of-the invention is to provide a tubing head for supporting the well tuhing which is'soarranged that the blowout preventer,v

or'oth'er safety device, through which the tubing has beenrun' into-the well, may be'removed from thereabove and said tubing'will be. retained. m

without danger ofbeing blownthere-a ,(Fig 1n'e 1) thewell pressure around said tubing I will tend to by-fpass' the slips through the joints.

As above, pointed out, "theleak'age between thev seat I2 and outer-faces is reduced toga minimum the joint It at. (Figure 3) the point where the edges of the slips} meet, a packing strip I5 is provided on feach edge. packingis preferably 0! ama-- terial, which is unafleo't'e'd by oil or ysuch as duprine, or the like. Each packing strlpis formed with a dove-tail l6. which is arranged-to .the well from,

A construction designed to carry out the invention-will behereinafter described, together {g -with other features or the'invention.

The invention will be more readily understood from a reading of the following specification-and by reference to'the accompanying drawings in which an example-oi the invention is shown, and

' 4 whereinz' Figure 1' is a transverse, vertical, sectional view 1 of a tubing head constructed in accordance with the'invention,

I Figure 2 is a horizontal, cross-sectional view, 5 taken on the linej2+-2 of Figure 1'.- Figure 3 is a horizontal, cross-sectional view,

taken on the line 1-3 ofiFlgure i. Figure 4; is an isometric view ofone of the gripping slips.- f

s of anotherform oi. the invention.

Figure 6 is a' view similar to Figure 1, showing another form' of the invention." Figure 'l is a horizontal cross 55 taken on the line of Figure 6.

ctional view,

inventionis to providea Y are mounted in the. tubing'head and the weight Figure 5 is atransv'erse, vertical sectional view age v the entire weight oil-the tubing isup'on the slips, 1 g said slips are iorcedto theirlowermost position i .within theflared seat Ii which will cause the Fig'ure 8 is anisometrical view of one ofthe slips, having a portion broken away to disclose.-

the inner packing ing, and

Figure, 9 is isometric packing ring and the metal retainin v the drawings ,.the numeral Ill designates a cylindrical body which forms the main portion of theftubing-head; The low'erendof the body-- is provided; with a reduced nipple i I Y which is. externally screw-threaded, whereby the body may view of "the inner l be mountedon. a casing head or other support (not shown); The 'upper end of the body isprovide'd withian outwardly extending annular flange i i', while. threaded voutlet openings IUP- are formed in'thesides oi; the body for'receiving the .usuai-outletpipes (noti shownli' i The bore; ill of the -body is flared at its upper end and this flared portion is machined to iormi a ground seat 12. Gripping slips I! having their .oi ter, faces beveled-to coniorm'to' the seat are ar-- ranged to {be supported thereby. These outerfaces-of said slips are also machined so that when the slips are seated as shown in Figure l, a ground joint is provided; This serves to reduce leakage. ot the wellj pressure through this joint to aminimum. g 5 llh'e'well tubing A, shown in Figured; extends, downwardly through the bore l0 into the well and the slips i3 engage this tubing .to suspend 'thetubing from'the bodyill. It will-be seen that afterthefslips and tubing are in position due to the ground joint. 7 Toprevent leakage through of the slips. This engage in a vertical dove-tail groove II, in the with each edge or the slips l llprovidedfwith the packing strips the slips are seated to support thetubing these we w '5, it is obvious that. when 5 packing strips on the edges or oneslip-will enthose on the other slip (Figure 3). Since 1 gate valve.

slips to be-forcedinwardly toward each other. This action will compress-the packing strips [5 at the edges of the slips and will thereby form .a fluid tight seal at the joints between the edges of the slips, whereby the well pressure beneath the slips is prevented from escaping through these joints. 1

A flanged member l8, having an axial bore I9, is disposed on top of the body I0 and the well tubing A extends upwardly therethrough. The bore I9 is slightly larger thanthe inner diameter of the slips so that a collar B may be secured on the tubing, supported by said slips, directly above said slips. The flange l8 of said member is provided with openings 20 which register with openings 2i in the flange ll of the body when said member is in position thereon. Bolts 22 pass through these registering openings and receive nuts 23 to fasten the member on the body. The

member is provided with a central upwardly extending nipple 24 which is externally screwthreadedwhereby'any suitable safety, or other device may be mounted thereon. I

As has been'pointed out, the packing strips l5 positively prevent any leakage of well pressure through the joints between the slips. The

ground seat reduces the leakage between the.

seat and outer face of the slips'to a minimum.

However, some pressure does escape and to make nular groove, whereby an annular packing ring 26 may be mounted at the upper end of the joint between the seat-and slips. This ring is preferably of metal but may be of any suitable materiaL' It is obvious that the member l8- holds the ring in position, and the particular location of said ring positively prevents leakage of the well pressure at this point. So long as said member is in position on the body, all leakage of well pressure is prevented and the well tubing Ais suitably supported. a

In using the tubing head, the body I0 is screwed onto the upper end of the casing head (not shown) or other support the flanged-member I8 and slips l3 being removed. A gate valve (not shown) is bolted to the flange II at the upper end of the body and a blowout preventer or other device (not shown) is mounted on the The drilling may then be done though the body I0 and when it is desired to run the tubing. A into the well, said tubing is first blanked in the usual way and run through the safety devices and body l0. When it is desired tosuspend the tubing, the slips l3 are dropped thru any safety devices secured to the upper end of the body and it 'is obvious that they will seat within the ground seat l2 at the upper end of the bore, of said body. Theteeth of the slips will, of course, engage the tubing, whereby the same is supported.

The gate valve and other safety devices (not shown) may then be disconnected and removed from the body and it is obvious that the pressure can escape only by seeping by the ground The pressure thus escaping under most,

being postured by the bolts 22 and nuts 22. It

is obvious that with the above arrangement, the well tubing A is suitably supported in the well and leakage of any well pressure is positively prevented. The .flanged member l8 may be substituted for a safety device after the tubing has been run 'into the well without the loss of any pressure. There is no danger of the well tubing being blown out at any time. The ground 'joint and seat, together with the' metal packing ring 26 at the top of this joint, as well as the packingstrips l5 between the edges of the slips provide a leak proof seal when the device is assembled. Although only two slips [3 are shown,- itis pointed out that any desired number may be employed so long as each has the packing strips l5 along its verticaledges.

In Figure 5, I have shown another form of the invention. In this form, instead of the slips, an internally screwthreaded collar 35 is provided. This collar seats in the flared ground seat l3 and the'operation of this form is the same as the first form, the collar being threaded on the tubing before the same is run into the well. It is pointed out that in both forms, the ground joint and annular packing ring 25 prevent leakage of the pressure between the seat tubing supporting element.

In Figures 6 to 9, I have shown still another form of the invention. In using the device in wells having extremely high pressures, it has been and the found that pressure will escape by the threads of the slips, that between the bore of said slips and the outer periphery of the tubing. To prevent this escape' of pressure, the form shown in Figures 6 to 9 are employed. This form is vsubstantially the saineas that shown in Figurexl, except that an annular groove 40 is formed in the inner toothed wall of. the slips near the upper end thereof. This'groove receives a split'metal j ring 4| and also a resilient packing ring 42, which is constructed of rubber or other suitable material. The packing ring is located so that when the slips are in position around the tubing, said ring engages the surface. of the tubing as clearly shown in Figure 6. The slips are provided with radially extending openings 43 and when the rings and slips arein' position these openings are alined with the screws 30, thus, the screws may be rotated until their inner ends bear against the metal ring 4| to force the same'inwardly. This forces the packing ring 42 'into intimate contact with the tubing and leakage between said tubing and the threads of the slips isprevented. What I claimand desire to secure by Letters Patent is:

1. A tubinghead including,- abody having an axial bore therethrough, said bore havingits upperv end flared and machined to form a ground seat, a well tubing supporting member arranged to engage in and be supported by said seat, the

outer face of said member which engages the 1 -35 of each slip so. that when the slips are seated the packing strips are located between the. engaging contact with the tubing-supported. by the member for packing off the joint to prevent leakage of well pressure thereby, said packing means providing a pressure seal between ground surfaces of the seat and the supporting member.

2. A tubing head including, a body having'a seat at its upperend, slips'arr'angedto be seated within said seat for supporting well tubing, means at the upper end of the. joint'between the seat andslips and free from contact with the tubing supported by said slipsfor packing off said joint to be seated within said seat and having their to prevent leakage of the well pressure thereby,

and packing betweenthe upper edges of the slips,

the packing means and the upright packing providing a complete fluid seal from the well between the seat-and the tubingsupport.

3; .A tubing head including, a body having a seat at its upper end,a' plurality of slips arranged to be seated within said seat and having their vertical edges engaging to form-a circular gripping member for supporting a well tubing,

means between the engaging edges of theslips for preventing leakage of the wellpressure thereby, means at the upper end of the-joint between the slips and seat joint to prevent .leakage of the well pressure thereby, and means at the upper end 'of the joint between-the slips and seat for packing oil? said joint to prevent leakage of the well pressure thereby.

4. A tubing head including, a body having a' seat atits upper end, a plurality of slips arranged vertical edges engaging to form a circular gripping member for supporting a well-tubing, and a packing strip disposed along eaclrvertical edge edges of said slips to prevent leakage of the well pressure thereby, and means-at the upper'end of the joint between the slips and seat for packing off said. joint to prevent leakage of the well pressure thereby.

5. A tubing head including a body having a seat at its upper end, a plurality of slip's ar-' ranged to be seated within said seat and havingtheir vertical edges engaging to form 'a circular gripping member for, supporting a well tubing, and a packing strip disposed along each vertical edge of each slip sothat when the slips are seated the packing strips ing ring located at the upper end of the joint between the slips and seatfor packing off said joint to prevent leakage of the. well pressure thereby, and means secured tothe upper end of the body for retaining said ring in position. v

6. A tubing head including, a body having a seat at its upper end, aplurality of slips arranged to be gripping member for supporting a welltubing, means between the engaging edgesofthe slips for preventing the slips and seat for packing off said joint to prevent leakage of the well pressure thereby, and

means arranged toengage the slips' after theyhave been seated to prevent vertical displacement thereof by the well pressure.

'1. A tubing head including a body having an axial bore therethrough, said-bore having its upper end flared and machined to form aground seat, a well tubing supporting member arranged to engage in and be supported by said seat, the

' sure are located betweenthe engaging edges of said'isli'ps to prevent leakage of the well pressure thereby, an annular metal p'ackf out disturbing either of seated within said seat and having their vertical edges engaging to form a circular.

leakage of the well pressure there by, means at the upper end of the 'joint-between 'tween'the member-and seatxis' had, means beventing leakage of the well pressure therebytand'. 1 means at the upper end of the joint between the slips and seatfor packing oifsaid'joint to pre vent leakage of the well pressure thereby.

8; Atubing head including, 'a bodyhavinga seat at its upper end; a. member for supporting well tubing arranged tobe'supportedin said seat,

means atthe upper end of the joint'between said seat, and member for preventing leakage 'ofwell pressure through said ioint,fand a split packing ring carried by the member for engaglngthe' surface of the tubing toprevent leakage between member. a ,9. A tubing head including, a body. having an axial bore therethrough, said bore having its.

said tubing and the gripping]- surface of said.

upper'end flared and machined to form aground seat, a well tubing supporting member arranged to engage in and be supported by said seat, the

outer face of said member which engages the seat being machined whereby a ground joint between the member and seat is had, means at the upper end of said joint and free from contact with the tubing supported by the member for packing off the joint to prevent leakage of wellpressure thereby; and means carried by. the 'memher for engaging the surface of the tubing to prevent. leakage between said tubingand the gripping surface of "said member.

10.; A tubing head including, a seat at its upper end, a plurality of slips arranged to be, seated within said seat and" having their yertical edges engaging to .form a circular gripbody having a ping member for supporting a well tubing, means I between th engagingedges of the slips for preventing lea age of the well pressure thereby, means at the upper end of the joint between the slips and seat joint to preventleakage of the well pressure thereby, m ean's at the upperend of the joint between the. slips "and seat. for packing off said joint to prevent leakage of the well presthereby, and means carried by the slips for n agin leakage between said tubing. teeth of said slips. r

vertical passage provided with an inclined annu the surface of thev tubing to' prevent andthe gripping 11-. A tubing head including,'a body having a- Y lar seat at its upper end, a tubing support having an inclined outer surface 'engagingin-said seat, and an annular packing at the upper end of the joint between'th'e inclined surface of theseat and the support, whereby a pressure seal between the seat'and the support-accessible with-5 vided. w

12. A tubing head including, a body having a said elements, is provertical passage provided with an inclined annular seat at its upper end, a tubingsupport having an inclined outer surface epgaging in's'aid seat, an annular packing at the upper end of the joint .between the inclined surfacesof the seat and the support,-whereby a pressure seal between the seat and the supportaccessible without dis-' turbing either of "said'elements, is provided; and

. a closure. member fastened on the body and exerting adownward pressure on said packin 13. A tubing head including, a body having a seat at its upper end, slips for supporting well tubing arranged to be supported in saidseat, a

split packing ring inserted in the inner faces of the slips for engaging the surfaces oLthe tubing to prevent leaking between said tubing and the gripping surface of said slips, and individually operated means-extending radially through the body and the slips for forcing said packing ring into engagement with the'tubing.

14. A tubing head including a body having a seat at its upper end, slips arranged to be seated within said seat for supporting. well tubing, means at the upper end of the joint between the seat and slips and free from contact with the tubing supported by the slips for packing off said'joint to prevent leakage of the well pressure thereby, and

means arranged to engage the'slips after they 1 have been seated to prevent vertical displacement thereof by the well pressure.

,' LAURENCE L. REC'I'OR. 

